RFR: 8319326: GC: Make TestParallelRefProc use createTestJavaProcessBuilder [v3]

[Ramkumar Sunderbabu]

On Wed, 3 Dec 2025 14:38:57 GMT, Ramkumar Sunderbabu <rsunderbabu at openjdk.org> wrote:

>> Summary of change:
>> 
>> 1. executeLimitedTestJava changed to executeTestJava to allow flags to be propagated to forked processes.
>> 2. Allowing GC flags will result in VM initialization error ("Multiple garbage collectors selected"). So, test is split into separate sections pertaining to GC requirements. @requires now has corresponding GC flag condition.
>> 3. Removal of WhiteBox dependency and few cleanups.
>> 
>> Testing:
>> HS Tiers 1 and 2 
>> Ran with all flag combinations in CI
>
> Ramkumar Sunderbabu has updated the pull request incrementally with one additional commit since the last revision:
> 
>   test split into sections

The latest changes have been tested with all flag combinations in CI

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PR Comment: https://git.openjdk.org/jdk/pull/28508#issuecomment-3607183856